1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
4 */
5
6 #include <common.h>
7 #include <cpu.h>
8 #include <dm.h>
9 #include <errno.h>
10 #include <asm/cpu.h>
11 #include <asm/global_data.h>
12
13 DECLARE_GLOBAL_DATA_PTR;
14
cpu_x86_bind(struct udevice * dev)15 int cpu_x86_bind(struct udevice *dev)
16 {
17 struct cpu_plat *plat = dev_get_parent_plat(dev);
18 struct cpuid_result res;
19
20 plat->cpu_id = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
21 "intel,apic-id", -1);
22 plat->family = gd->arch.x86;
23 res = cpuid(1);
24 plat->id[0] = res.eax;
25 plat->id[1] = res.edx;
26
27 return 0;
28 }
29
cpu_x86_get_vendor(const struct udevice * dev,char * buf,int size)30 int cpu_x86_get_vendor(const struct udevice *dev, char *buf, int size)
31 {
32 const char *vendor = cpu_vendor_name(gd->arch.x86_vendor);
33
34 if (size < (strlen(vendor) + 1))
35 return -ENOSPC;
36
37 strcpy(buf, vendor);
38
39 return 0;
40 }
41
cpu_x86_get_desc(const struct udevice * dev,char * buf,int size)42 int cpu_x86_get_desc(const struct udevice *dev, char *buf, int size)
43 {
44 char *ptr;
45
46 if (size < CPU_MAX_NAME_LEN)
47 return -ENOSPC;
48
49 ptr = cpu_get_name(buf);
50 if (ptr != buf)
51 strcpy(buf, ptr);
52
53 return 0;
54 }
55
cpu_x86_get_count(const struct udevice * dev)56 int cpu_x86_get_count(const struct udevice *dev)
57 {
58 int node, cpu;
59 int num = 0;
60
61 node = fdt_path_offset(gd->fdt_blob, "/cpus");
62 if (node < 0)
63 return -ENOENT;
64
65 for (cpu = fdt_first_subnode(gd->fdt_blob, node);
66 cpu >= 0;
67 cpu = fdt_next_subnode(gd->fdt_blob, cpu)) {
68 const char *device_type;
69
70 device_type = fdt_getprop(gd->fdt_blob, cpu,
71 "device_type", NULL);
72 if (!device_type)
73 continue;
74 if (strcmp(device_type, "cpu") == 0)
75 num++;
76 }
77
78 return num;
79 }
80
81 static const struct cpu_ops cpu_x86_ops = {
82 .get_desc = cpu_x86_get_desc,
83 .get_count = cpu_x86_get_count,
84 .get_vendor = cpu_x86_get_vendor,
85 };
86
87 static const struct udevice_id cpu_x86_ids[] = {
88 { .compatible = "cpu-x86" },
89 { }
90 };
91
92 U_BOOT_DRIVER(cpu_x86_drv) = {
93 .name = "cpu_x86",
94 .id = UCLASS_CPU,
95 .of_match = cpu_x86_ids,
96 .bind = cpu_x86_bind,
97 .ops = &cpu_x86_ops,
98 .flags = DM_FLAG_PRE_RELOC,
99 };
100